JP6530661B2 - Solenoid valve device - Google Patents

Description

  The present invention relates to a solenoid valve device, and more particularly, to a solenoid valve device that achieves power saving by reducing power supplied to the solenoid valve and that solves a problem due to heat generation of the solenoid valve.

  The solenoid valve used to control the flow of fluid has a problem that the heating of the coil causes problems due to the heating of the coil energized during operation. The applicant has already filed the invention disclosed in Patent Document 1 as a technique for solving the problem caused by the coil heating of the solenoid valve.

  The invention disclosed in Patent Document 1 includes a timer relay means and switching system constant voltage means in a solenoid valve control circuit for charge / discharge control of opening and closing a solenoid valve, and the timer relay means operates to operate the solenoid valve and the power supply. The power supply to the solenoid valve is reduced by supplying the voltage that has been dropped by the switching method constant voltage means to the solenoid valve through the other electrical path when the electrical path connecting the components is cut off after the predetermined energization time. Save energy and reduce the heat generation of the solenoid valve.

JP, 2014-206240, A

However, the invention of Patent Document 1 has a disadvantage that the operation time is delayed and the contact life is short because the timer relay means for supplying the voltage of the power supply to the solenoid valve is a mechanical contact relay.
In addition, a switching system constant voltage means for supplying a voltage-dropped voltage to the solenoid valve lays a heat sink to dissipate heat generated by the loss of the semiconductor element or transformer, but it is necessary to sufficiently dissipate heat from the circuit part There was a problem that

  The object of the present invention is to provide a solenoid valve control circuit which can reduce the power supplied during the normal operation of the solenoid valve and can suppress the heat generation of the coil of the solenoid valve when the solenoid valve is constantly supplied and eliminate the problems due to the heat generation. To realize a solenoid valve device.

The present invention, in order to remove the above disadvantages, an electromagnetic valve device comprising a solenoid valve control circuit which controls the opening and closing of the electromagnetic valve, before SL solenoid valve control circuit is connected to the solenoid valve, and a power source for supplying a voltage path and, a timer-type non-contact relay means for the cut-off state the path after a predetermined energization time, the timer-type non-contact when said path running said timer-type non-contact relay means becomes a cutoff state to and switching method constant voltage means for supplying a voltage which is the voltage drop in the solenoid valve by other path that bypasses the relay unit, and the voltage backflow prevention means provided on the solenoid valve side of the switching type voltage regulating means, said electromagnetic and a surge voltage absorbing means and a capacitor provided so as to be parallel with each relative to the valve, the timer-type non-contact relay means, voltage drop the voltage supplied from the power supply Conversion circuit, a trigger circuit that outputs a trigger signal when the voltage output from the conversion circuit is supplied, and the trigger signal are turned on in response to the trigger signal, and a predetermined time has elapsed from the on operation A light emitting element that emits light by an output signal based on the turning on operation of the timer circuit and a light emitting element that stops light emission by the output signal based on the turning off operation of the timer circuit, and receives light from the light emitting element A photo coupler including a light receiving element, and when the photo coupler is on, outputs the voltage of the power supply as a drive voltage to the electric path, and stops the output of the drive voltage on the electric path when the photo coupler is off An external connection same potential circuit, and the solenoid valve control circuit is attached to a metal exterior part of the solenoid valve, and the switch The heat radiating plate laid on the ring system voltage regulating means in a state of being connected to the outer portion, characterized in that provided in the control board to be coated in the housing case having a heat dissipating function.

In the solenoid valve device according to the present invention, the timer type non-contact relay means supplies a voltage from the power supply to the solenoid valve for a predetermined energizing time to drive it, and the switching mode constant voltage means turns to the solenoid valve after the predetermined energizing time elapses. Since the voltage-dropped voltage is supplied to hold the drive of the solenoid valve, the power supplied to the solenoid valve can be reduced while the solenoid valve is kept in the drive state, energy saving can be realized, and the voltage drop Since the drive of the solenoid valve is held at the set voltage, heat generation of the coil of the solenoid valve can be suppressed.
Moreover, the electromagnetic valve apparatus of this invention can promote the thermal radiation from the exterior part of a solenoid valve by having connected the heat sink installed in the switching system constant voltage means to the exterior part of a solenoid valve. And, by suppressing the heat generation of the solenoid valve coil by the supply of the voltage-dropped voltage and promoting the heat radiation by the heat sink of the switching type constant voltage means, it is possible to more reliably solve the problems due to the heat generation of the solenoid valve. .
Furthermore, since the solenoid valve device of the present invention is not a mechanical contact relay, but supplies voltage to the solenoid valve by timer-type contactless relay means, the operation time delay which is a drawback of the mechanical contact relay is , It can be compensated that the contact life is short. In addition, since the timer type noncontact relay means has an extremely small volume compared to the mechanical type contact relay, it can be integrated with other electric means such as a switching type constant voltage means, so that the solenoid valve control circuit is small. It becomes possible to mount on a control board.
Furthermore, according to the solenoid valve device of the present invention, the heat sink mounted on the switching type constant voltage means is connected to the exterior portion of the solenoid valve on the control substrate on which the solenoid valve control circuit is mounted. The valve control circuit can be integrated, and the device can be made compact.

FIG. 1 is a schematic configuration diagram of a solenoid valve device provided with a solenoid valve control circuit. (Example) FIG. 2 is an explanatory view of a solenoid valve to which a control board of the solenoid valve control circuit is attached. (Example) FIG. 3 is a view showing suction force characteristics of the solenoid valve. (Example) FIG. 4 is a wiring diagram of the timer type non-contact relay means. (Example) FIG. 5 is an operation table of the timer type non-contact relay means. (Example) FIG. 6A is a view showing a high voltage continuous supply state, and FIG. 6B is a view showing a voltage supply state by the solenoid valve control circuit. (Example) FIG. 7 is a view showing a coil temperature rise characteristic of the solenoid valve. (Example) FIG. 8 is a diagram showing changes in the coil temperature in the high voltage continuous supply state and the coil temperature in the voltage supply state by the solenoid valve control circuit for power saving. (Example) FIG. 9 is a diagram showing the relationship between the photocoupler and the voltage by the solenoid valve control circuit. (Example)

  Embodiments of the present invention will be described in detail below based on the drawings.

1 to 9 show an embodiment of the present invention. 1 and 2, the solenoid valve device 1 includes a solenoid valve 2 used to control the flow of fluid, and includes a solenoid valve control circuit 3 that opens and closes the solenoid valve 2.
As shown in FIG. 2, the solenoid valve 2 incorporates a coil 5, a core 6, a spring 7 and a plunger 8 in a metal exterior portion 4 and has a valve portion 9 which is opened and closed by the plunger 8. . The solenoid valve 2 moves the plunger 8 by the suction force generated by the core 6 excited by the coil 5 and the spring force of the spring 7 to open and close the valve portion 9.
The coil 5 is supplied with a drive voltage necessary to move the plunger 8 from the non-drive position toward the drive position (suction point) as shown in FIG. 3, and then the moved plunger 8 is at the drive position. It is supplied with the holding voltage necessary to hold it. The suction force characteristic generated by the coil 5 is maximized at the drive position where the plunger 8 is attracted to the core 6 and becomes smaller as it is separated from the drive position. The plunger 8 moves (strokes) between the non-driving position and the driving position.
When a drive voltage is supplied to the coil 5, the solenoid valve 2 causes the plunger 8 to move from the non-drive position to the drive position by the generated suction force, and the valve portion 9 starts to open. When the plunger 8 moves close to the drive position, the solenoid valve 2 switches the drive voltage supplied to the coil 5 to the lowered holding voltage, and the generated suction force causes the plunger 8 to move further toward the drive position. Reaches the drive position, and the valve 9 is completely opened.
Thus, the solenoid valve 2 is a normally closed solenoid valve that closes when not energized and opens when energized. The solenoid valve 2 is disposed in the middle of a fluid passage (not shown) through which fluid flows to control the flow of fluid.

The solenoid valve control circuit 3 controls opening and closing of the solenoid valve 2 by voltage.
As shown in FIG. 1, the solenoid valve control circuit 3 includes an input plus terminal 11 to which a voltage (for example, 24 V) of the power supply 10 is input and an input minus terminal 12 grounded. , And an output negative terminal 14 connected to ground.
The input-side positive terminal 11 and the output-side positive terminal 13 are connected by an electric path 15 for driving voltage and are connected by an electric path 16 for holding voltage in parallel with the electric path 15. The input-side negative terminal 12 and the output-side negative terminal 14 are connected by an electric path 17 for negative.

The solenoid valve control circuit 3 is provided with a timer type non-contact relay means 18 for setting the power path 15 in a cut-off state after a predetermined energization time in the power path 15 connecting the coil 5 of the solenoid valve 2 and the power supply 10 for supplying voltage.
As shown in FIG. 4, the timer type non-contact relay means 18 converts a voltage supplied by turning on (ON) the power supply 10 to a low voltage (for example, 5 V) and outputs it, and a low voltage conversion IC 19 The output of the trigger circuit 20 which is turned on with a low voltage supplied from the conversion IC 19 and outputs a trigger signal, the timer IC 21 which is turned on by the trigger signal and turned off when a predetermined energization time elapses, and the output of the timer IC 21 which is turned on The photocoupler 22 includes a light emitting element 22a and a light receiving element 22b which are turned on by a signal and turned off by an output signal of the timer IC 21 which has been turned off.
The timer type non-contact relay means 18 has a resistor 23 in the electric path 15 on the power supply 10 side of the low voltage conversion IC 19 and is externally connected to the electric path 15 on the solenoid valve 2 side (output side positive terminal 13 side) of the photocoupler 22. The same potential circuit 24 is provided. The external connection same potential circuit 24 connects the power supply 10 to the electric path 15 connected to the collector side of the light receiving element 22 b of the photocoupler 22 through the resistor 25 and the LED 26. The external connection same potential circuit 24 outputs the voltage of the power supply 10 as a drive voltage to A of the electric path 15 when the photocoupler 22 is turned on, and stops outputting the drive voltage to A of the electric path 15 when the photocoupler 22 is turned off. .
The timer type non-contact relay means 18 turns on the photocoupler 22 for a predetermined conduction time counted by the timer IC 21 after the start of the conduction by turning on the power supply 10, thereby making the electric path 15 for the drive voltage conductive and outputting the drive voltage. Do. Further, the timer type non-contact relay means 18 turns off the photocoupler 22 after a predetermined current-flowing time counted by the timer IC 20 has elapsed, thereby making the electric path 15 a cut-off state and stopping the output of the drive voltage.

As described above, the timer type noncontact relay means 18 is a relay (solid state relay) having no movable contact portion using the photocoupler 22 as a semiconductor element switching element, and is externally connected for a predetermined conduction time counted by the timer IC 20. The drive voltage is supplied to the solenoid valve 2 by the same potential circuit 24.
The predetermined energization time is an instantaneous time (for example, 200 ms to 500 ms) in which the plunger 8 can be moved from the non-drive position to the vicinity of the drive position (suction point), and can be freely set. is there.
Further, in the solenoid valve control circuit 3, a power supply amplification circuit 27 is disposed in the electric path 15 on the solenoid valve 2 side (the output side plus terminal 13 side) of the timer type non-contact relay means 18. The power supply amplification circuit 27 includes two resistors 28 and 29 and a transistor 30 and operates with the drive voltage output from the externally connected same potential circuit 24 to amplify the voltage of the power supply 10 and generate the coil 5 of the solenoid valve 2. Supply.

The solenoid valve control circuit 3 includes a switching system constant voltage means 31 in the electric path 16 for holding voltage parallel to the electric path 15 for driving voltage. The switching system constant voltage means 31 includes a heat sink 32 and is connected to the electric path 17 for minus. The switching type constant voltage means 31 supplies the voltage (for example, 9 V), which is lowered by a voltage lower than the drive voltage of the electric path 15, to the solenoid valve 2 by the other electric path 16 bypassing the timer type noncontact relay means 18 Do.
The switching type constant voltage means 31 supplies the voltage, which is reduced in voltage from the start of energization by turning on the power supply 10, to the solenoid valve 2 through the electric path 16 and the timer type noncontact relay means 18 operates to cut the electric path 15 Even after the output of the drive voltage is stopped, the voltage dropped is supplied to the solenoid valve 2. The voltage dropped is more than 0% and less than 100% of the voltage of the power supply 10 (for example, 24V) (for example, DC 15V, DC 12V, DC 9V, etc.).
Since the power supplied to the solenoid valve 2 is proportional to the square of the voltage, when the holding voltage is 1/2 of the drive voltage, the power consumption is 1/4 with a voltage drop of 1/2. As the power consumption decreases, the heat generation state of the coil 5 also becomes about 1/4.

The solenoid valve control circuit 3 includes a voltage backflow prevention means 33 in the electric path 16 on the solenoid valve 2 side (the output side plus terminal 13 side) of the switching type constant voltage means 31. The voltage backflow prevention means 33 is formed of a diode for preventing voltage backflow, and prevents a drive voltage higher than the holding voltage from flowing back to the switching system constant voltage means 31 side.
In addition, the solenoid valve control circuit 3 has a surge voltage between the electric path 16 on the solenoid valve 2 side and the electric path 17 for minus than the switching type constant voltage means 31 so as to be in parallel with the solenoid valve 2 respectively. An absorbing means 34 and a capacitor 35 are provided.
The surge voltage absorbing means 34 is a diode for absorbing a surge voltage, and is disposed between the electric path 16 closer to the solenoid valve 2 than the voltage backflow preventing means 33 and the electric path 17 for minus. The surge voltage absorbing means 34 absorbs a surge voltage generated instantaneously when the timer type non-contact relay means 18 shuts off the electric path 15 and shuts off the high voltage supplied from the power source 10 to the solenoid valve 2. The capacitor 35 is disposed between the electric path 16 closer to the switching system constant voltage means 31 than the voltage backflow prevention means 33 and the electric path 17 for minus.
Further, the solenoid valve control circuit 3 arranges the resistor 36 and the LED 37 in series between the electric path 16 closer to the solenoid valve 2 than the surge voltage absorbing means 34 and the electric path 17 for the minus, so that the switching system constant voltage means 31 A capacitor 38 is disposed between the electric path 16 on the power source 10 side (the input side positive terminal 11 side) and the electric path 17 for the minus side.

  The solenoid valve control circuit 3 mounts the timer type noncontact relay means 18, the external connection same potential circuit 24, the power supply amplification circuit 27, the switching type constant voltage means 31, etc. on the small control board 39. The control board 39 is attached to the exterior 4 of the solenoid valve 2 as shown in FIG. The control board 39 attached to the exterior part 4 connects the heat sink 32 laid on the switching system constant voltage means 31 on the board to the exterior part 4 and is covered with a storage case 40 having a heat dissipation function. The control board 39 is connected to the power supply 10 by the connection wire 41.

Next, the operation will be described.
The solenoid valve device 1 positions the valve unit 9 in a fluid passage (not shown) through which the fluid flows, arranges the solenoid valve 2, and operates the solenoid valve control circuit 3 to open / close the solenoid valve 2.
As shown in FIG. 5, when energization of the solenoid valve control circuit 3 is started when the power supply 10 is turned on (ON), the trigger circuit 20 of the timer type non-contact relay means 18 is turned on. The trigger signal is output, and the timer IC 21 is turned ON by the trigger signal to start timing at the same time as the photocoupler 22 is turned ON, the external connection same potential circuit 24 is operated (ON) and a high voltage (24 V) from the power supply 10 Are output (ON) to A of the circuit 15 as a drive voltage.
In addition, when the solenoid valve control circuit 3 starts to be energized when the power supply 10 is turned on (ON), the voltage (9 V) dropped by the switching method constant voltage means 31 is used as a holding voltage to Output to 16
The output drive voltage and holding voltage are supplied to the coil 5 of the solenoid valve 2. The solenoid valve 2 moves the plunger 8 from the non-drive position toward the drive position (suction point) by the suction force of the coil 5 and opens the fluid flow path by the valve unit 9 to allow the fluid flow.

In the solenoid valve control circuit 3, when the momentary predetermined energizing time elapses, the timer IC 21 is turned off and the photocoupler 22 is turned off, and the externally connected same potential circuit 24 is stopped (turned off) to drive the drive voltage 15 Stop outputting to A. The solenoid valve 2 supplied with the drive voltage and the holding voltage for a predetermined energization time moves the plunger 8 to the drive position by the suction force of the coil 5 and causes the valve portion 9 to fully open the fluid passage.
Since the solenoid valve control circuit 3 shuts down the electric path 15 after a predetermined energization time, only the holding voltage (9 V) whose voltage is dropped by the switching type constant voltage means 31 is supplied to the solenoid valve 2 by the electric path 16. The solenoid valve 2 can maintain the state (opened state) of the valve body 9 operated at the high drive voltage even when supplied with the lowered holding voltage.
Thus, the control valve device 1 can reduce the power supplied to the solenoid valve 2 after the predetermined energization time has elapsed. The degree to which the voltage is dropped is set in consideration of power consumption, the amount of heat generation of the solenoid valve 2 and the like.
The solenoid valve control circuit 3 stops the supply of the holding voltage whose voltage is dropped by the switching type constant voltage means 31 when the power supply 10 is turned off (OFF) to stop the energization. In the solenoid valve 2, the suction force by the coil 5 disappears by stopping the supply of the holding voltage, the plunger 8 at the drive position moves by the spring force of the spring 7 and returns to the non-drive position, and the fluid flow path is closed by the valve 9 Block the flow of fluid.

Here, the heat generation of the solenoid valve 2 will be considered.
In the case of a solenoid valve operating at a direct current 24 V of a rated voltage, the coil is magnetized by the application of a direct current 24 V which is a drive voltage to drive a plunger. The coil generates heat when energized. About the rise of coil temperature at this time, when the resistance value for every lapsed time was measured using a 81.7 ohm coil, the data which showed the result of a rise in coil temperature shown in Drawing 6-Drawing 8 were obtained. The temperature of the coil was calculated according to the JIS resistance method.
As shown in FIG. 6A, when a drive voltage of 24 V DC is continuously energized, the coil starts generating heat within several minutes, and the temperature rise of the coil becomes 120 ° when 120 minutes have passed since the start of energization. (See FIGS. 7 and 8).
On the other hand, as shown in FIG. 6 (B), when the rated voltage 24 V is shut off instantaneously (200 ms) and the holding voltage (9 V) is given, the solenoid valve is kept driven by the holding voltage. The temperature rise of the coil at 120 minutes after the start of energization was 10.9 ° C., and heat generation was suppressed (see FIGS. 7 and 8).

The solenoid valve device 1 according to the present invention supplies large driving energy only for a short time at the initial stage of operation of the solenoid valve 2 and can hold the small driving energy during normal operation of the solenoid valve 2 by the solenoid valve control circuit 3 Voltage is supplied to the solenoid valve 2 by two systems. That is, the solenoid valve control circuit 3 simultaneously supplies a high voltage (drive voltage) by the timer type noncontact relay means 18 and a low voltage (hold voltage) by the switching system constant voltage means 31 at the start of operation of the solenoid valve 2; Immediately after the solenoid valve 2 operates (after a predetermined energization time), the timer type non-contact relay means 18 shuts off a high voltage.
For example, the solenoid valve device 1 simultaneously energizes the solenoid valve 2 with a voltage of 24 V DC and a voltage of 12 V DC or less, and immediately after the drive of the solenoid valve 2 is completed after a predetermined energization time has elapsed, When the voltage is shut off, only the voltage of DC 12 V or less is energized to the solenoid valve 2.
This means that, in terms of electric power, 75% of the electric power is cut off by supplying only the direct electric 12 V which has cut off the 24 V DC. Moreover, since the calorific value of the coil 5 is similarly suppressed, the power consumption is suppressed by 75%, and the economic effect is also remarkable.
Furthermore, when the standardized low voltage IC (9 V) is selected as the holding voltage supply means, it is possible to obtain an energy saving effect of 86% in design value.

Next, the heat generation of the solenoid valve control circuit 3 will be considered.
The heat generation problem of the solenoid valve control circuit 3 is the processing of the heat sink 32 laid on the switching system constant voltage means 31 which is a low voltage IC.
This was solved as follows.
As described above, when the direct current 12V is supplied by interrupting the direct current 24V, the heat generation of the solenoid valve 2 is suppressed by 75%, so the heat generation of the exterior portion 4 constituting the solenoid valve 2 is also suppressed. From this, the solenoid valve device 1 suppresses the heat generation by the synergetic effect of promoting the heat radiation of the solenoid valve control circuit 3 by connecting the heat sink 32 of the switching type constant voltage means 31 to the exterior part 4 of the solenoid valve 2 It has been proved by experiments that it is possible.
The effect of the above heat release is also apparent from the coil temperature rise test data shown in FIGS. It has been confirmed that the calorific value of the switching type constant voltage means 31 is extremely small compared to the calorific value of the solenoid valve 2 and that there is practically no influence on the fluid controlled by the other components and the solenoid valve 2. In addition, when the temperature in the summer room rises, even if the user touches the exterior 4 of the electromagnet 2, the temperature is maintained at about the temperature, so it can be confirmed that there is no problem at all.
The solenoid valve device 1 has a control board 39 on which the solenoid valve control circuit 3 is mounted in the embodiment attached to the exterior portion 4 of the solenoid valve 2, and the heat sink 32 laid on the switching type voltage regulator 31 is mounted on the exterior portion 4. Although connected, the small solenoid valve consumes a small amount of power, and the heat sink 32 installed in the switching method constant voltage means 31 has sufficient effect, so even if the control board 39 is separated from the solenoid valve 2, the energy saving effect is achieved. Can be demonstrated.
In addition, even when the linear type constant voltage circuit IC, which is known to have relatively high heat generation characteristics and requires a large radiator, does not show any change in the energy saving effect. From this, it is also possible to use a linear constant voltage IC, and there is a large economic effect because components can be widely selected.

Further, the solenoid valve device 1 adopts timer type noncontact relay means 18 in the solenoid valve control circuit 3 as a device for instantaneously interrupting the rated drive voltage of the solenoid valve 2 in order to suppress the drive energy of the solenoid valve 2 did. The timer type non-contact relay means 18 is composed of a non-contact relay (SSR: solid state relay) composed of a transistor such as an IC, and as shown in FIG. To start the operation of the solenoid valve 2.
The timer type non-contact relay means 18 can directly operate a large amount of power, and improve the mechanical relay time delay, reduce the size of the device, and improve the deterioration of the contact life caused by the transient phenomenon that occurs when interrupting the direct current. can do. Further, the timer type non-contact relay means 18 does not generate heat because of the momentary predetermined energization time, and the same applies to other parts.
The solenoid valve device 1 enables the power control to be performed with no contact from the turning on of the power supply 10 as described above by the timer type non-contact relay means 18, and can realize the solenoid valve 2 led to power saving, This energy saving effect is beneficial to a wide range of industries.

As described above, in the solenoid valve device 1, the timer type non-contact relay means 18 supplies a voltage from the power source 10 to the solenoid valve 2 for a momentary predetermined energization time to start driving, and the predetermined energization time has elapsed. After that, the switching system constant voltage means 31 supplies the voltage dropped from the power supply 10 to the solenoid valve 2 to hold the drive of the solenoid valve 2.
As a result, the solenoid valve device 1 can reduce the power supplied to the solenoid valve 2 while holding the solenoid valve 2 in the drive state, and can realize energy saving, and the solenoid valve 2 can be operated with the voltage dropped. Since the drive of the above is maintained, the heat generation of the coil 5 of the solenoid valve 2 can be suppressed.
In addition, the electromagnetic valve device 1 can promote the heat radiation from the exterior portion 4 of the solenoid valve 2 by connecting the heat sink 32 laid on the switching type constant voltage means 31 to the exterior portion 4 of the electromagnetic valve 2 . Then, the solenoid valve device 1 suppresses the heat generation of the coil 5 of the solenoid valve 2 due to the supply of the voltage-dropped voltage and promotes the heat radiation by the heat sink 32 of the switching system constant voltage means 31. Problems due to heat generation can be eliminated more reliably.
Furthermore, since the solenoid valve device 1 uses the timer type non-contact relay means 18 instead of the mechanical type contact relay in the solenoid valve control circuit 3 and supplies voltage to the solenoid valve 2 by the timer type non-contact relay means 18 It is possible to compensate for the improvement in operating time delay which is a drawback of mechanical contact relays and the short contact life. Further, since the timer type non-contact relay means 18 has a very small volume compared to the mechanical type contact relays, it can be integrated with other electric means such as the switching type constant voltage means 31, so that the solenoid valve control circuit 3 can be mounted on a small control board 39.
Furthermore, the solenoid valve device 1 is connected to the exterior portion 4 of the solenoid valve 2 by connecting the heat sink 32 laid on the switching type constant voltage means 31 on the control substrate 39 on which the solenoid valve control circuit 3 is mounted. The solenoid valve 2 and the solenoid valve control circuit 3 can be integrated, and the device can be made compact.

  The solenoid valve device according to the present invention can reduce the power supplied during the normal operation of the solenoid valve, can suppress the heat generation of the coil of the solenoid valve when the solenoid valve is constantly energized, and eliminate the problem due to the heat generation. The energy saving effect by the reduction of the power can be applied not only to the solenoid valve but also to a device for instantaneously interrupting the rated drive voltage of the device driven by electricity.

DESCRIPTION OF SYMBOLS 1 solenoid valve device 2 solenoid valve 3 solenoid valve control circuit 4 exterior part 9 valve part 10 power supply 15 electric path for drive voltage 16 electric path for holding voltage 17 electric path for minus 18 timer type noncontact relay means 19 low voltage conversion IC
20 trigger circuit 21 timer IC
22 photocoupler 24 external connection same potential circuit 27 power supply amplification circuit 31 switching system constant voltage means 32 heat sink 33 voltage backflow preventing means 34 surge voltage absorbing means 35 capacitor 39 control board 40 storage case 41 connecting wire

Claims (1)

In a solenoid valve device provided with a solenoid valve control circuit for opening and closing control of a solenoid valve,
Before Symbol electromagnetic valve control circuit,
Before SL solenoid valve, the electrical path connecting the power supply for supplying a voltage,
A timer-type non-contact relay means for said electric path cut-off state after Jo Tokoro energization time,
The timer-type supplying a voltage which is the voltage drop by other electrical path contactless relay means the path operates to bypass the timer type non-contact relay means upon a cutoff state to the solenoid valve switching Hoshikijo Voltage means ,
Voltage backflow prevention means provided on the solenoid valve side of the switching type voltage regulating means,
A surge voltage absorbing means and a capacitor provided so as to be parallel with respect to previous SL solenoid valve,
Equipped with a,
The timer type noncontact relay means
A conversion circuit that converts a voltage supplied from a power supply into a voltage drop;
A trigger circuit that outputs a trigger signal when the voltage output from the conversion circuit is supplied;
A timer circuit that is turned on in response to the trigger signal, and is turned off when a predetermined time has elapsed from the turned on operation;
A photo including a light emitting element that emits light by an output signal based on the on operation of the timer circuit and stops light emission by an output signal based on the off operation of the timer circuit, and a light receiving element that receives light from the light emitting element Coupler,
An externally connected equipotential circuit which outputs the voltage of the power supply as a drive voltage to the electric path when the photocoupler is on, and stops the output of the drive voltage to the electric path when the photocoupler is off;
Have
The solenoid valve control circuit is attached to a metal exterior portion of the solenoid valve, and a storage case having a heat dissipation function in a state where a heat dissipation plate laid on the switching type constant voltage means is connected to the exterior portion. A solenoid valve device provided on a control substrate to be coated .

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